B747-400 Sys Switch AQP sit

Question 1

Batt switch off what busses do you have?

Answer 1

Off-2 busses main hot battery and apu hot battery bus.

Question 2

Batt swt on what buses do you have?

Answer 2

4 total. Main hot battery bus, apu hot battery bus, main battery bus, apu battery bus.

Question 3

Duration of fully charged battery?

Answer 3

30 min.

Question 4

Standby power selector to auto what items do you have.

Answer 4

Pfd,nd,L fmc, L cdu, primary eicas,L adc, L eiu, L efics panel, stand by instruments.

Question 5

What is power source for main and apu standby power.

Answer 5

Main powered by ac bus 3, apu standby powered by capt transfer bus.

Question 6

Secondary power with loss of ac bus 1&3,

Answer 6

Main and apu hot battery bus via inverters.

Question 7

Why do 2 flap indicators show flaps extended and 2 do not?

Answer 7

When battery switch on and the standby power switchis inauto and no other power is on the airplane, the standby power system excitation to the right wing but not the left wing.

Question 8

What does x represent ?

Answer 8

Invalaid data

Note do not move flaps handle to match flaps.

Question 9

Hydalic demand pumps off why is it important to have demand pumps off?

Question 10

What if #2 selector is in auto would it be running now?

Answer 10

No, 1&4 are air driven

Question 11

What if selector #4 is in auto, would it be running now?

Answer 11

No, 2&3 elect driven.

Question 12

Why is it important for wipers to be off?

Answer 12

So you dont damage screen.

Question 13

What position should the flaps handle be in.

Answer 13

Both position and handle should agree, leave in up position.

Question 14

Alt flap selector off, what would happen if switch was in the alt position?

Answer 14

Arms alt flaps knob, shuts off primary and secondary modes, asymmetry not available and flap lever inop.

Question 15

If the alt flap selector was in EXt , would flaps be extending?

Answer 15

Leading edge and trailing edge EXt elect. Max range 25 degrees.

Question 16

Wx radar test
Would the radar be operating if it was in weather or wx/turb position

Where is on/off switch.

Question 17

Transponder stby,

If test was selected would the tcas system test now?

Answer 17

No, xpndr setting, go to TA/RA.

Question 18

Establish electrical power-

What does it mean when avail light is on ext pwr 1 and/ 2

Answer 18

Means systems are ready to recieve correct power voltage

Question 19

What bus is powered with avail light illuminated?

Answer 19

The main deck cargo handling bus is powered on the ground when external power 2 or apu generator 2is avail

Ground handling bus is powered on the ground when APU generator 1 or ext power 1 is avail.

If both EXT and APU avail lights on, ext power has priority.

Question 20

What can be accomplished with buses powered?

Answer 20

Ground handling bus, fuel tow and load

Ground service bus is powered on the ground and in flight whenever ac bus 1 is powered. Ground service bus poweres individual equipment items such as ,
Bat charger,fuel pumps for apu start , lights and outlets.

Question 21

Grd svc switch byL1 door?

Why do we not select ext pwr #2 when we select #1 on?

Question 22

Bus tie swt in auto

Why is it necessary?

Answer 22

Auto, arms automatic ac bus tie circuitry
Closes related dcir.

Question 23

Ext power #1 swt on

What busses are now powered?

Question 24

Flap position indication

Flaps start moving toward up why?

What mode are they moving in?

Question 25

How many buses are there

Answer 25

8